> For the complete documentation index, see [llms.txt](https://docs.sendstackhq.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.sendstackhq.com/delivery-api/messaging.md).

# Messaging

- [Send Customer Message](https://docs.sendstackhq.com/delivery-api/messaging/send-customer-message.md)
- [Add Private Note](https://docs.sendstackhq.com/delivery-api/messaging/add-private-note.md)
- [Update note status](https://docs.sendstackhq.com/delivery-api/messaging/update-note-status.md): Update note by providing the noteId